The Investigative Committee of Russia said on Saturday that it is looking into a pilot error or a technical failure as the most likely causes for the plane crash that killed 62 in southern Russia, Russian news agencies reported.

"At present, we are looking into two main theories for the plane crash in Rostov-on-Don: pilot error in connection with deteriorating weather conditions or a technical error," Interfax news agency cited a representative of the Committee, Oksana Kovrizhnaya, as saying.